Sash balance



W. E. WREAD.

SASH BALANCE.

APPLICATION FILED JAN. 30, I922.

Patented Sept 26, 1922.

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'llz'am E mead Patented Sept. 2a, 1922.

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WILLIAM E; WREAD, 03 LOS ANGELES, CALIFURIQIA, ASSIGNOR T AEMAND Y. BEI'VERGE, OF LOS ANGELES, CALIFORNIA.

slasn BALANCE.

Application filed Tanuary 30, 1922. Serial No. 532,573.

T 0 aZZ whom it may concern:

Be it known that 1, WILLIAM E. JVREAD, a citizen of theUnitedStates, residing at Los Angeles', in the county of Los Angeles and State of California, have invented new and useful Improvements in Sash Balances,

, ofwhich the following is a specification.

ill)

An object of this invention is to displace the heavy cumbersome and expensive means now generally employed for measurably balancing a window sash and the like so as toenable the same to be raised and lowered with ease. i

The invention is broadly new, basic and pioneer in that I provide a device comprising a mounting adapted to be secured to the window j a'mb and provided with a fixed axle on which is journalled a pulley connected to such axle and arranged to be taken up by a spring and provided externally with a flexible connection fixed at one end to the pulley and wound on the pulley and adapted at the other end for attachment to the window sash.

The mounting and the pulley may be constructed of castings, drop forgings or pressed sheet metal. A-ifurther object of the invention is cheapness of construction, ease of manufacture and application to the window frame and window; and durability and smoothness of operation.

Further objects, of the invention are freedom from getting out of order; and ease of accessibility for repairs incase of break- A-n object is to eliminate the expense and disadvantages that attend the installation and use of window weights which are now generally employed in the construction of buildings. 7

Where window weights are used as sash balances it is necessary toprovide-inside. the window frame or wall on each side of the window, runways and pockets for the weights; and it is alsonecessary to make provision foraccess to the pockets so that in case the sash-cords break, the weights will be accessible at the bottom of the runway. An object is to avoid such runways andpockets. v

A further expense with respect to window an object of this invention is to provide a very light, cheap and simple device that will take the place of window weights and will at reduce the cost of transportation and the difiiculties and expense of installation.

An object is to so construct the appliance as to provide a bead to cover the edges of the pulley seat in the jamb, and a stop to an determine the depth to which the pulley will be inserted into the window jamb.

The device is applicable with any suitable form of flexible connection, but it is preferable that such connection shall be flat and of that the appropriate sash balancing weight w can be installed. I

If the weight of the window is changed by insertingheavier or lighter glass, the window is out of balance and there is no pro vision made to correct it except by changing as the weight. I

An object of this invention is to overcome this difliculty by providing an adjustable sash balance. Other obJects, advantages and features of tion' and the appended claims.

inv n ionmay appear from the accompany- 9a 1ng'dI5tW1I1g', the subjoined detail descrip- The invention is applicable in various forms.

The accompanying drawing illustrates the a jamb of a window frame ready to receive 10 a sash; the sash connection is shown as a I metallic ribbon partly drawn out from the pulley for the purpose of attaching to a weights, is the cost of transportation; and window sash, not shown.

Fig. 2 is a fragmental view showing the appliance in section on line 03 Fig. l, with the sash in place in a window frame which is shown installed in a building; a fragment of the studding of which is shown.

Fig. 3 is a section of the appliance detached. Line 00 Fig. 2 indicates the line of section. The sides of the pulley wheel are shown as made of castings or drop forg- 1n s.

Fig. 4: is a view of the inner face of a sheet metal stamping adapted to be pressed into form for the mounting or housing shown in Figs. 1, 2 and 3. The retainer tongues are fully bent into form.

Fig. 5 is an edge view of the stamping shown in Fig. 4:, after the retainers have been fully bent.

Fig. 6 is an elevation looking at the inner or rear edge of the completed housing bent up from thestamping shown in Figs. 4: and 5.

Fig. '2' is a side view of said completed housing.

Fig. 8 is a View of a sheet metal pulley with its parts assembled on an axle in a housing, omitting the spring and the sash connection.

Fig. 9 is an axial section of a pulley structure formed by fastening two sheet metal stampings together for use with two takeup springs.

Fig. 10 is an axial section of the invention applied with duplex spring, and adapted to accommodate a sash chain instead of a flexible metallic tape.- The .axle is shown fixed to the wheel.

Referring first to the forms shown in 1 to 8, inclusive The side walls 1 of the mounting or housing are bent trom the escutcheon 1" and are provided respectively with bearings 2, in which the axle 3 of the pulley is fixed against Figs.

rotation. The inner end of the clock spring a is fixed to said axle as indicated in Fig. 2 and said spring is coiled around the axle, and its outer end is fastened at 5 to the rim 6 of the pulley 7 that is journalled as by the ball bearing 8 on cylindrical portions Set the pulley axle 3, the ends of which axle are angular in cross-section to seat-in the bearings 2 in the housing 10. The flexible sash connection 11 is shown as a brass tape, one end of which is fixed to the rim 6 of the pulley by any suitable means as by being bent to hook into a slot 12 in the pulley rim. The escutcheon I" is provided with an orifice 13 througlr which the connection 11 passes from the pulley to the runway 14 for the sash 15. The outer end of the tape-11 is secured by any suitable means to the sash 15. Such means are shown in the drawing as a plate 16 having slots 17 through which the tape is bent back and forth, and a screw me ias 18 countersunk into and passing through the plate and screwed into the sash rail. The plate terminates in a hook 19 inserted into and engaging the sash at 19'.

The pulleys are shown constructed of two metal members secured together so as to form a chamber a and these members may be variously constructed and of various forms but are practically the same.

In Fig. 3 the members 20 and 21 that form the sides of the pulley are shown as castings or drop forgings; the member 20 being) provided with the collar 22 and the mem er 21 being provided with a collar 23, and said collars being adapted to interlock with each other; the outer collar 22 being provided with a groove 24 and the inner collar 23 being provided with the bead 25 that interlock with each other when the two members are pressed together.

lln. Fig. 8 the side members are shown as made of pressed sheet metal.

In Fig. 9 the two members 26, 26' are alike and their webs 27 are fastened together by any suitable means as the rivets 28 to form spring chambers b on opposite sides of the webs.

The pulley may be provided with any suitable means for attaching the spring thereto inside the pulley chamber, and for attaching the tape thereto to bee wound around the outside of the pulley.

lln Figs. 2 and 8 the members 20, 21 are shown provided with a slotted imprint 29 in the slots 12 of which the outer end of the spring 1 is fastened; while the axle 3 is provided with a slot 30 in which the inner end of the spring a is inserted. This construction is also practically employed in the form of pulley shown in Fig. 8.

In the form shown in Fig. 9, two slots 31 are provided in the axle. to receive the inner ends of two springs, 34: Fig. 10; and the pulley wheel is provided with two posts formed of a single piece 32 provided with the slots 33, and constitute attaching means for the outer ends of the two springs. The pulleys in each instance are flanged so as to form a space as at 35 in Figs. 8, 9 and 10, to accommodate the tape, chain or rope cord as the case may be, which constitutes the connection between the sash and the rim of the pulley.

The webs of 'the pulley shown in Fig. 9 are providedwith a central orifice in which raceways 36 of any suitable character are providedto'receive bearingballs 37 which anti-frictionally support the pulley wheel on the axle. r

Anti-friction ball bearings are shown between the pulley wheel and anxle in Figs. 3, 8and 9. r

In the forms shown in Figs. 1-9 the spring is fixed at one. end to the pulley axle and at the pulley. The outer end of the spring is then slipped through the slot 12 in the collar of the other side member of the pulley and then the two pulley members are brought together, the axle extending through the central orifice of both said members, and

said members being held together by the interlocking of their collars.

The flexible connection is then wound around the rim of the pulley and then the pulley will he slipped into the housing, the sides 1, of which are spread apart to allow -the squared end of the pulley axle to enter Retaining fingers 39 are struck up fromthe housing 10 and are bent so as to form V a bead .40- at the edges of the escutcheon 1" of the mounting; The free edges of the retaining fingers are turned outward at 41 to engage the jamb 42 when the mounting 'is inserted into the mortise 43 made in the When the housing 10 is inserted into the window frame, the bead 40 coversthe edges of the mortise in the jamb. The beads 40 serve as a stop to determine the depth to which the sash balance will be inserted into the jamb. The outwardlyturned edges 41 of the retaining fingers 39 engage the inner surface of the window jamb and prevent accidental dislocation of the sash balance, and also eliminate the necessity of holding the sash balance in. place ,with screws or other similar means. i

In the form shown in Fig. 10 the pulley is constructed substantially as in Fig. 9,

excepting that the webs 38 are fixed to the axle 3 and said axle is,journalled at M in the mounting 45'that has posts 46 to which the outer ends of the spring 34 are fixed. The inner ends of said springsare fixed to the axle in the slots 31.

In any of the forms shown, when it is desired to changethe balancing efiect of the device the free end of the tape 11 being detached from its retaining plate 16, the pulley willbe held firm and the end of the tape will then be passed through the slot 31 and wound around the pulley another turn or more as the case may require.

The tape is provided with a hook 47 to engage the plate 16 and said book also the spring and prevent the tape from being drawn into the housing to unwind the spring.

The axles 3 and 300 8 and 9 are bent up out of. sheetmetal into cylindrical form and the angularity to said axle is given b milling off the sides as at 301.

I claim:

1. A sash balance comprising a housing, a fixed axle, a pulley on said axle, flexible means connected to said pulley and adapted to be connected to a sash to be balanced, and means adapted to revolve said pulley to take up the flexible means.

2. A sash balance having a housing composed of a stamping bent to form side members, a fixed axle, a pulley comprising side members secured together to form a chamher and being adapted to revolve on said axle, flexible means connected to and wound upon said pulley and adapted at one end to be connected to a sash to be balanced, and means in said chamber adapted to revolve said pulley to take up the flexible connection.

shown in Figs. 2, 3.

3. A. sash balance having a housing composed of a stamping bent to form side members, a fixed axle, a pulley comprising side members secured together to form a. chamber and being adapted to revolve on said axle, flexible means connected to and Wound upon said pulley and adapted at one end to be connected to a sash to be balanced, and a spring in said chamber, connected to said pulley and said axle and being adapted to revolve said pulley to take up the flexible means. v

4. A sash balance congiprising a housing, a fixed axle, a pulley ong said axle, flexible means connected to said pulley and adapted to be connected to a sash to be balanced, and means connected to said pulley and said axle and being adapted to revolve said take up the flexible means.

5. A sash balance having a housingcomposed of a stamping bent to form side members and adapted to engage and to hold the housing in an opening in the window jamb, an axle fixed to said side members, a pulley adapted to revolve on said axle, flexible means connected to and wound upon said pulley and adapted at one end to be connected to a sash to be balanced, and' means adapted to revolve said pulley to take 'up the flexible means.

6. In a sash balance comprising a mounting comprising an escutcheon having a slot therethrough; side members and retaining fingers bent from said escutcheon, said side members being provided "with holes to receive the ends of the "pulley supporting axle; said holes being angular and the axle pulley to retaining fingers which are having angular ends to engage said holes;

a pulley wheel journalled on said axle, and a spring connecting said pulley wheel and said axle to form a take-up for a flexible sash connection.

7 A sash balance comprising pulley members having rims and Webs; means to fasten the webs together -to form spring chambers on opposite sides of the webs; an axle supporting said webs and provided with slots; springs having their inner ends fastened in said slots,and'a fixed support by which said springs are held at the other end for the purpose of revolving the pulley.

8. A sash balance pulley having its rim 

